根据高考3500词整理：高中英语必会1051个短语！(13)

426. can’t help but do sth
427. can’t help (to) do sth
428. can’t help doing sth
429. help sb out
430. help sb with sth
431. with the help of ...
432. without hesitation
433. don’t hesitate to contact me
434. hesitate about doing sth
435. think highly of
436. think little of...
437. in history
438. hold back/ on / out / up
439. on holiday
440. in honour of
441. in memory of
442. in hope of...
443. hurry up
444. hurry to the hospital
445. in a hurry
446. if only
447. only if
448. what if...
449. imagine doing sth
450. be impressed at / by / with sb/ sth
451. impress the value of sth on/ upon sb
452. leave/ make / create a good impression on sb
453. improve the situation before it is too late
454. on the increase/ decrease
455. have an influence on ...
456. inform sb of sth
457. keep me informed of sth
458. insist on/upon doing sth
459. for an instant
460. the instant i saw him, i knew...